1. WICI Presentation to FLEWUG
Application of “Soft” & “Hard” Technology to Improve Capacity & Quality in Land Mobile Radio Networks
June 13, 2000
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2. Enlightening ideas to wireless solutions
Agenda
Lumenix Corporate Overview
VRI Corporate Overview
Case Study - Nextel Communications
Soft & Hard Technology Application
Conclusion
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3. Lumenix Corporate Capabilities
Wireless Data Applications
Geolocation & Mobile Data Messaging
Enabling Wireless Web Sites
Wireless Corporate Portals
Specialized Application Development (WAP, Palm OS, CDPD, others)
Wireless Engineering
Commercial Wireless Networks
Public Safety Network Design
Radio Network Optimization
Voice & Data Wireless Design
Wireless LAN, WAN, PBX
Technical & Business Consulting
Strategic Wireless Planning
Wireless Program Management
Modeling & Simulation
IV&V
Technical Training & Customer Support
Information Technology
Specialized Software Development
ASP System Architecture
Database Management
System Design & Integration
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4. VRI Corporate Capabilities
Analysis & Consulting
Policy Development
Modeling & Simulation
Economic Analysis
Re-Engineering
System & Operational Effectiveness
Enterprise Support
Program Management
Customer Support & Training
Web Server Hosting
System Testing Laboratories
Database Administration
Systems Administration
SIMPLIFY
SUSTAIN
Information Technology
Information Systems Planning
Requirements Definition
Technology Evaluation
Data Quality Engineering
System Design & Development
System Installation
Clients
Department of Defense
Department of Treasury
Department of Health & Human Services
OPIC
States
Commercial
SOLVE
SATISFY
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5. Case Study Nextel Specialized Mobile Radio (SMR)
Nextel SMR network similar to LMR public safety radio network
Original SMR network design (prior to 1990)
High power/large coverage area base station design
Five and ten channel – low capacity networks
Current SMR network design (1990 to present)
Low powered, smaller coverage area base station design
Radio channel aggregation per market
Extensive co-channel reuse per market to increase capacity
Site-to-site “hand-off” incorporated into network
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6. “Soft” and “Hard” Technology Application
Soft Technology
Radio channel aggregation
Tower top LNA application
Convention directional antennas
Frequency reuse and cell splitting
Hard Technology
Trunked LMR implementation
Smart antenna technology
Improved vo-coder to 6.25 MHz channel
Multi-band radios
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7. LMR Channel Aggregation
Independent radio channel management per bureau/agency
Traditionally required for security of mission critical activity
Low carrying capacity due to limited channel availability
Channel sharing requires extensive radio unit programming
Department/agency channel aggregation
Centralize frequency management
Overcome political barriers to channel aggregation
Greater carrying capacity of network
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8. Channel Trunking Capacity Analysis
Radio channels 5 15 25 35 50
Total Erlangs
1.66E
9.01E
17.5E
26.4E
40.3E
# of 15 second calls per hour
396
2,146
4,167
6,293
9,584
Assumptions
15 seconds average communication duration
Erlang table with 1% blocking
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9. Alternative “Soft” Technology Applications
Tower top low noise amplifier
Uplink radio coverage imbalance (additional Rx sites)
Improve Rx reception quality from 4-7dB
Reduce Rx site requirements
Increase co-channel reuse per market/region
Reduce base station power
Reduce base station height
Add additional base stations
Incorporate directional antennas
Reduce distance-to-reuse (D/R)
Increase system capacity
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10. Typical Conventional LMR Network Diagramx x x x x x x x x
Tx Coverage
Rx Coverage x x x
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11. Typical Conventional LMR Network Diagram With Tower Top LNAsx x x x x x
Tx Coverage
Rx Coverage x x
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12. Omni Directional Antenna Base Station Designx x
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13. Directional Antenna Base Station Design
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14. LMR Channel Reuse Design Architecturex
Tx Coverage
Rx Coverage
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15. “Hard” Technology LMR Applications
Trunked radio networks
Increased network capacity (channel aggregation required)
Interoperability enhancements
Interconnection to PSTN (Public Switch Telephone Network)
Improved features
Channel privacy
One-to-one, one-to-all, one-to-talk group communication
Channel queuing
Priority access for immediate channel access
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16. “Hard” Technology LMR Applications (cont.)
Improved APCO 25 vo-coder for capacity enhancement
Double capacity over current 12.5 MHz channel
Multi-band LMR radio technology
30-50 MHz
MHz
MHz
Smart antenna technology
Uplink and downlink improvement of 5-8 dB
Multi-antenna “beam streaming” array design
Integration with manufacturer requirement
Channel capacity and quality improvement
MHz
800 MHz
900 MHz
New 700 MHz band
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17. Smart Antenna Architecture & Performance
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18. Enlightening ideas to wireless solutions
Conclusions
Develop best suited short-term and long-term strategic approach to enhance network capacity and quality
Pursue bureau/agency channel aggregation
“Soft” technology application
Channel aggregation
LNA deployment
Directional antennas
Cell splitting and frequency reuse
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19. Enlightening ideas to wireless solutions
Conclusions (cont.)
“Hard” technology application
Deploy trunked networks
Upgrade to 6.25 MHz vo-coder
Multi-band radios
Smart antennas
Cooperative support from radio manufacturers
Lobby for new frequency allocation
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20. Enlightening ideas to wireless solutions
Contact Information
Lumenix
Rick Burke
7611 Little River
Turnpike, Ste. 404W
Annandale VA 22003
Vector Research Inc.
Kirit Amin
901 S. Highland St.
Arlington, VA 22204
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